To help you with this investment, the Brussels Region gives you an energy grant, which is supplemented by certain communes. for a family of 4 people, demanding 200 to 300 litres, with 3 to 5 m 2 of solar collectors) costs on average € 4,500 to € 6,000, including VAT and installation. Likewise, the efficiency is best at a gradient of 35° to the horizon, but good results can be achieved with collectors fitted vertically to a façade.Ī basic solar water heater (i.e. However, the collectors also work well in other seasons, when the sky is cloudy, for a good part of the day, even if they face east or west. The efficiency of the collectors is at its highest at midday, in summer, when the sky is cloudless, and when the collectors face south. Supplying a washing machine or dishwasher with this hot water also cuts out the electricity used by these appliances to heat the water and shortens the washing cycles, as long as certain precautionary measures are taken. However, a back-up heating system is required for times when there is insufficient luminosity. Generally speaking, it is possible to heat 50 to 70 % of the water used in the kitchen and the bathroom in this way.
In our latitudes, the sun shining on 1m² of roof replaces 100 l of heating oil or 100 m³ of natural gas (approximately 1 000 kWh) a year. Moreover, it is a way to produce hot water for sanitary use throughout the year without emitting any CO 2. It can be an economical way to generate hot water for your family (for shower and bath).Ī solar heater not only enables substantial energy savings as solar power is free in contrast to natural gas or fuel oil. A solar water heater is a device that captures sunlight to heat water.
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